A multilayer surface comprising at least two layers, said layers having different refractive indexes such that selective wavelengthscolours are transmitted and or reflected. In transmitting 3D objects composed of 3D mesh data, it is very important to progressively restore transmitted data as well as to effectively code the 3D mesh data. The method includes receiving the slew rate controlled signal, and recovering the high frequency component by shaping the slew rate controlled signal to produce a shaped signal, where the shaped signal includes the received slew rate controlled signal and the high frequency component. All transition flight is a resolution of the force vectors of the two pendulums. Because the detection circle is a rotation-independent geometry, the over-extraction and under-extraction problems associated with conventional wide element extraction methods can be eliminated.